If you want to add personality then start buying stuff or collecting things from where you enjoy going.

Upstairs One wall is dedicated to pictures of family. Son’s bedroom is tractor themed and has one wall in John Deere green, another wall has a large laser cut tractor cling on it. Daughter’s bedroom is horse themed with a mural that a friend’s daughter painted, opposite wall is purple. Laundry room is clothing themed, kidding ;). Master bedroom and bath is beach themed with pictures from Hawaii and our favorite OBX beach and bed wall is teal. Loft is music themed with a piano and flute + things.

Main Floor Other walls in the house have bamboo cutting boards of the states we have family in, our state flag on wood, a large picture of our a bunch of doors in our hometown that our friend took and we framed, flags hanging vertically in my office (it has high ceilings), a wood laser cutting of my wife’s profession, a painting my father made in our dining room. Opposite wall has a massive picture of one of our favorite places . Entryway has a 4 shelf unit that has beer steins, Lladro sculptures, a piece of wood from the log home my father in law built (and we helped with), a large heart shaped price of granite rock from a friend’s property in the Rockies, lots of Tinkerbell stuff (wife’s mother loved her), lots of Hawaiian themed things (we love Kauai).

Basement Movie themed. Wife’s craft room is Harry Potter themed. Theater has movie posters and a large Disney castle picture over the couch. We also have a movie popcorn maker on an electric fireplace which is a lot of fun. Son’s bedroom is space themed since he loves that.

All of that took us ~20 years to collect. My wife looks at Pinterest and other places for ideas others have done and then incorporates what we like. Don’t worry about what other people will think of what you do. They want to see your personality, that’s the fun part!